[jira] [Commented] (KAFKA-5876) IQ should throw different exceptions for different errors

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-5876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654572#comment-16654572 ] 

ASF GitHub Bot commented on KAFKA-5876:
---------------------------------------

vitojeng opened a new pull request #5814: KAFKA-5876: IQ should throw different exceptions for different errors(KIP-216)
URL: https://github.com/apache/kafka/pull/5814
 
 
   This pr would be discussed KIP-216 of the mailing list in parallel. 
   Any suggestion is welcome.
   
   *More detailed description of your change,
   if necessary. The PR title and PR message become
   the squashed commit message, so use a separate
   comment to ping reviewers.*
   
   *Summary of testing strategy (including rationale)
   for the feature or bug fix. Unit and/or integration
   tests are expected for any behaviour change and
   system tests should be considered for larger changes.*
   
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)
   

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> IQ should throw different exceptions for different errors
> ---------------------------------------------------------
>
>                 Key: KAFKA-5876
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5876
>             Project: Kafka
>          Issue Type: Task
>          Components: streams
>            Reporter: Matthias J. Sax
>            Assignee: Vito Jeng
>            Priority: Major
>              Labels: needs-kip, newbie++
>
> Currently, IQ does only throws {{InvalidStateStoreException}} for all errors that occur. However, we have different types of errors and should throw different exceptions for those types.
> For example, if a store was migrated it must be rediscovered while if a store cannot be queried yet, because it is still re-created after a rebalance, the user just needs to wait until store recreation is finished.
> There might be other examples, too.



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